The interior of Australia is called Outback: the correct answer is B.
You can actually solve this question by just understanding that all the other options mention words related to the sea: coral reef, atoll, islands: so they're more likely to be on the shore of Australia, not in the middle.
A push factor is best defined as factors that makes you leave your country.
Answer:
Providing for growth
Explanation:
I am pretty sure it's providing for growth.
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